Clear-channel assessment in 40 MHz wireless receivers

摘要

A system including a plurality of filter modules to respectively communicate with a plurality of antennas, filter signals from channels other than a communication channel of a first wireless network, where the communication channel includes a first channel and a second channel, and generate a plurality of signals. A sensing module senses, based on the plurality of signals, whether radio frequency signals from a second network are present in at least one of the first channel and the second channel, and generates a plurality of control signals indicating presence or absence of the radio frequency signals in at least one of the first channel and the second channel. A channel identification module determines, based on the plurality of control signals, availability of the first channel and the second channel in response to whether the radio frequency signals are present in the first channel and the second channel.

主权项

1. A system, comprising:
a plurality of filter modules configured to
respectively communicate with a plurality of antennas, wherein the plurality of filter modules are arranged in parallel,filter signals received via the plurality antennas from channels other than a communication channel of a first wireless network, wherein the communication channel of the first network includes a first channel and a second channel, andgenerate a plurality of signals; a sensing module configured to
sense, based on the plurality of signals, whether radio frequency signals from a second network are present in at least one of the first channel and the second channel, andgenerate a plurality of control signals indicating presence or absence of the radio frequency signals in at least one of the first channel and the second channel; and a channel identification module configured to determine, based on the plurality of control signals, that
the communication channel is not available for communication in response to the radio frequency signals being present in the first channel,the communication channel is available for communication in response to the radio frequency signals being not present in both the first channel and the second channel, andthe first channel is available for communication in response to the radio frequency signals being present only in the second channel.